US President Joe Biden has threatened to reinstate sanctions on Myanmar after the country’s military seized power.
Sanctions had only recently been eased, after the country began emerging from a decades-long military dictatorship.
On Monday, Aung San Suu Kyi and other elected officials were detained, with Ms Suu Kyi’s party accused of fraud over its landslide election win.
The UN, the UK and the EU have also condemned the military takeover amid fears of potential protests and unrest.
Ms Suu Kyi – who spent nearly 15 years in detention between 1989 and 2010 – has urged her supporters to “protest against the coup” in a letter written before she was detained. It warned the military’s actions would put the country back under a dictatorship.
The military has refused to accept November’s election results, declaring a year-long state of emergency. It has already replaced 11 ministers and deputies, including in finance, health, the interior and foreign affairs.
But in a statement, Mr Biden said “force should never seek to overrule the will of the people or attempt to erase the outcome of a credible election”.
The US had removed sanctions over the past decade as Myanmar progressed to democracy. Mr Biden said this would be urgently reviewed, adding: “The United States will stand up for democracy wherever it is under attack.”